This happens mostly in terms of oppositional pairs such as right and left, wet and dry, high and low, front and back, etc. Of course sometimes rhyme comes into play as well, such as when we go from small feet to big feet and then to pig feet. The illustrations all feature the strange hairy creatures that populate the imagination of Dr. Seuss, although you will see a pair of rather normal looking kids in the mix as well. Did you ever stop to think that Dr. Seuss is probably the most influential poet of his generation? He is certainly the most imitated, and behind all those silly rhymes was a deep desire to get kids to read. Once your beginning reader has read "The Foot Book," be sure to have them check out the sequel, "Fox in Sox."